Art of applying reinforcement to concrete-piling shells and the like.



Patented Nov. 28

@Moena 13 N. C. JHNSON.

APPLICATION r\LED1uNE4,19\5.

M 0F APPLYING RENFDRCEMENT TO CONCRETE vFILING SHELLS AND THE LIKE.

CTI

amenait o. manson, or ENGLEWOOD, :an

W JERSEY, ASSIGNQR T0 :RAYMNB CGN- CRETE PILE GQMEANY, 0F NEW YURH, N. Y., A CORPORATION 0F NEWT JERSEY.

F .MEETING REXNER-CEMENT '.lt CONCRETE-PTLING-SHELLS AND THE LIKE.

i ,eoeaar Application lei .lune 4, 1915.

y ing Reinforcement to (onei'ete-liling Shells andthe like, ot which the `following is a Speoil'iealion.

rly invention relates; to improvements in the art ol' applying reinforcement to ronrrete piling shells and the like, and consists 1u applying the reinforcement, preferabl)r in the torni ol a helle-ally wound coil, to an expansihle niandrel, inserting this mandrel in a suitablefeasing, and expanding the mandrel to cause, saine togrip the coil. driving the casino' with the mandrel within 1t, into the ground, and Causing the laterally-exert ed earth pressure ot' the ground then Sun rolnidiingY auch easing! to press the casing in 'ard around the reinforuenient and thereby to interlock the. casing' with Such reinforceinent.

At the, present day it is the practice to i'orzn reinforced piling-shells in the Shop placingl a helieally wound .reinforcing rod or wire either within or without a suitable easing (the wire coil being; usually placed within tlnl easing) `rand then by elaborate and expen ire machinery beading the easintriso ae. to rause the Same to interloek with the reinforringr Coil. Thispresent ,day method-,has the great ohjeetions that the Work must he done in the shop, and the linisihed easings shipped to the point of use;

whereas if the sheets from which the cas ,urna are to he formed A can he shipped flat to the point, of use, a d the reinforcingwire shipped in ,Coils tothe point of use, and the easiuf; formed and lthe reinforcing coil in- Serted atythe point of use, (as may he done aertn'dingrr to my invention) shipping costs are ver-y greatly reduced, also the use of the elaborate and expensive 'beading machinery heretofore referred to, is avoided.

l will nonr proeeed to denoribe my iorention with reference to the accompanying" drawings.v and will then point out the novel features in claims.

ln Said drawings, Figure 1 shows an elevation of a driving mandrel such as may he used lor driving,r piling shells, with a reiziforcingY coil therearound, and shows in cele tral vertical section4 the piling shell sar- Specification of Letters Patent.

.spindle 2 with Patented Nor. 8, Serial No. 32,1?4.

' rounding that mandrel and reinl'oreing eoil.

Fig. 2 is a similar view Showingr the shell partlyv driven into the earth and .showing how, hy the pressure exerteal hy the earth, the shell is pressed inward so as lori; with the reinforcingr coil. Fig. a detail view on 'a larger scale, showing` in lSection the interlocking of .the :shell with the reinforcing coil.

'in the drawings numerals l, l, designf/ite 65 :segment lea ves oi a mandrel., 2 designates a ventral spindle of the iuandreh'r design nales a driving head for the mandrel, and l. -l designate toggle levers connecting the the segmental leaves l. particular Construction of this mandrel ia unimportant for present purposes, since other well known inandrele: may Vhe. used; and moreover the particular mandrel-shown forms the subject matter of a separate plioation for Letters Patent tiled June el, 1915, Serial No. 39,173. ln general, it may he understood that the mandrel one olE auch nature that downward motion of the spindle 2 with reference to the leavinA l Se fori-ea these leaves outward.

5 designates the shell or easing, helieallv wound reinforeen'ient.

l designates a bottom piece or point. either xaeparahle from or attached mandrel itself, as may be deaired.

ln practising` my inrentionthe reinfore ingr coil is preferably ldravn over the inandrel whieh may he either in its collapsed or and (i a in its lxpaiided position.. lt is advantageous QQ y in many aiya, however, to draw the wounfl`- reinforcement over the mandrel. when in eollapsed position, expanding the mandi-elia such manner as to tightly hind the reinforce-I ment against the outside o the mandrel 95 leaves. Also. either before or after the en:- pansion of the mandrel and after drawing* the reinforcement over the mandrel the shell or casing is placed outside' of the mandrel and also outside of the reinforcement. this is done prior to the expansion of the mandrel suchexpansion is brought about by usual methods. In any event, after placing shell and reinforcement in proper'position on the mandrel whether 4this is done prior to m5 or after the expansion of the mandrel. 'the expanded mandrel with the assembled reinw i forcement and casing is driven into the ground by proper'means such es: a drop hammer or other types of hammer @one il@ to inter- 5,)

The if@ if roe mandrel: and suoli pressure is then the shell may l concrete will guard against monly employed in the art of driving piles. As the mandrel with its end easing shell is forced down into the earth the earth pres sure, exerted laterally upon the shell, forces that shell inward against and around the reinforcing coil il, forming a helical bead 8 on snc'ii shell, clearly shown in Figs. 2 and 3. The earth pressure thus exerted is oftentimes very great indeed; so much so that but for the reinforcing coil the shell would collapse immediately' upon Withdrawal of the therefore amply suiicient to force in the metal of the shell around the reinforcement, as shown.

After the casing has been driven, the mandrel is Withdrawn., the collapsibilty of the mandrel being;l such that when the stem 2 is drawn upward the leai'es l of the mandrel :1re drawn 1n clear of, the reinforcement, and

be iilled with liquid concrete: or if preferred, the liquid concrete Imay' be poured in `While the mandrel is in place. and the mandrel Withdrawn Ibefore the concrete has set; the latter method having the advantage that the Weight of the any possibility oi the suell being forced inward or upward by the 'pressure exerted upon it.

While have illustrated my invention as applied to `tapering shells, it obviously is equally applicable to straight cylindrical shells, the action involved in uniting the shell to the reinforcement, being the same, whether the shell be cylindrical or tapering.

What l claim is zl. The herein described improvement in the art of applying reinforcement to concrete piling shells and the like, which consists in driving a shell of material yieldable under earth pressure, each shell having supportingreinforcement within it, into the ,groundand by the laterally exerted earth pressure pressing the casing in around the reinforcement, and thereby causing the casing to unite with the reinforcement.

The herein describedirnprow-*ement in the art of applying reinforcement to oon-- 1 sonner crete piling shells and the like, which consists in driving a shell of material yieldable under-earth pressure, each shell having supporting reinforcement Within it, into the ground, and by the laterallyexerted earth pressure forming in the casing a bead receiving and in part surrounding the reinforcement.

3. The herein described improvement in the art of applying reinforcement to concrete piling shells and the like, which consists in placing around reinforcement a shell of' material yieldable under earth pressure, placing an expansible mandrel Within the shell and reinforcement, and expanding the mandrel and so holding the reinforcement against the shell, driving the shell, with the reinforcement and mandrel Within it, into the ground, and by the laterally exerted earth pressure pressing the shell inward and around the reinforcement, and thereby uniting the reinforcement with said shell, and leihen collapsing and withdrawing the manrel.

el. The herein described imprement in the art off-applying reinforcement to concrete piling shells and the.like, which consists in placing around a helically wound re. inforcement coil a shell of material yieldable under earth pressure, placing an expansible mandrel within that coil, and -eX- panding the mandrel and so holding the reinforcement against the shell, driving the shell, with the Within it, into the ground, and by the laterally exerted earth pressure pressing the shell inward and around the reinforcement, and thereby uniting the reinorcement with said shell, and then collapsing and withdrawing the mandrel.

In testimony whereof I have signed this specification in the presence of two subscribing Witnesses.

NATHAN-C. JOHNSON.

Witnesses:

H. M. llLinBLn, D. A.. Dams.

reinforcement and mandrel 

